var whichSubmit = "";
var g_pp_value = "";
var idValues;
function getUrlFor(str)	{
	var url = "iycdb.php?";
	var vpath = "";
	var form = document.getElementById("KHB");
	switch(str){
		case 'state_name':
			url += "method=restore_state_name&field=state_name&nextfield=lok_sabha_name";
			break;

		case 'lok_sabha_name':			
			if(form.state_name.value!="Select State"){
				url += "method=restore_lok_sabha_name&field=lok_sabha_name&nextfield=assembly_name";
				url += "&state_name="+form.state_name.value;
			}else{
				form.state_name.focus();
				url = "";					
			}
			break;
		
		case 'assembly_name':
			if(form.state_name.value!="Select State"){
				if(form.lok_sabha_name.value!="Select lok sabha"){
					url += "method=restore_assembly_name&field=assembly_name&nextfield=panchayat_name";
					url += "&state_name="+form.state_name.value+"&lok_sabha_name="+form.lok_sabha_name.value;
				}else{
					form.lok_sabha_name.focus();
					url = "";
				}
			}else{
				form.state_name.focus();
				url = "";					
			}
			break;

		case 'panchayat_name':
			if(form.state_name.value!="Select State"){
				if(form.lok_sabha_name.value!="Select lok sabha"){
					if(form.assembly_name.value!="Select Assembly"){
						url += "method=restore_panchayat_name&field=panchayat_name&nextfield=";
						url += "&state_name="+form.state_name.value+"&lok_sabha_name="+form.lok_sabha_name.value;
						url += "&assembly_name="+form.assembly_name.value;
					}else{
						form.assembly_name.focus();
						url = "";
					}
				}else{
					form.lok_sabha_name.focus();
					url = "";
				}
			}else{
				form.state_name.focus();
				url = "";					
			}
			break;

		case 'Submit':
			if(form.state_name.value!="Select State"){
				if(form.lok_sabha_name.value!="Select lok sabha"){
					if(form.assembly_name.value!="Select Project"){
						if(form.panchayat_name.value!="Select Date"){
							url += "method=restore_IDC_DETAILS&field=Submit&nextfield=";
							url += "&state_name="+form.state_name.value+"&lok_sabha_name="+form.lok_sabha_name.value;
							url += "&assembly_name="+form.assembly_name.value;
							url += "&panchayat_name="+form.panchayat_name.value;
						}else{
							alert("Please Select Panchayat and press submit!");
							url = "";
						}
					}else{
						alert("Please Select Assembly!");
						url = "";
					}
				}else{
					alert("Please Select lok sabha!");
					url = "";
				}
			}else{
				alert("Please Select State!");
				url = "";
			}
			break;
		default :
	}
	return url;
}

var xmlhttp;
var which_select = "";

var init_state_name = '<select name="state_name" id="state_name" onChange="showOptions(\'lok_sabha_name\')" style="width:150px; font:Arial, Helvetica, sans-serif 12px normal; color:#333333"><option value="Select Area" selected="selected">Select Area</option></select>';

var init_lok_sabha_name = '<select name="lok_sabha_name" id="lok_sabha_name" onChange="showOptions(\'assembly_name\')" style="width:150px; font:Arial, Helvetica, sans-serif 12px normal; color:#333333"><option value="Select Project" selected="selected">Select Project</option></select>';

var init_assembly_name = '<select name="assembly_name" id="assembly_name" onChange="showOptions(\'panchayat_name\')" style="width:150px; font:Arial, Helvetica, sans-serif 12px normal; color:#333333"><option value="Select Photopoint" selected="selected">Select Photopoint</option></select>';

var init_panchayat_name = '<select name="panchayat_name" id="panchayat_name" onChange="showOptions(\'\')" style="width:150px; font:Arial, Helvetica, sans-serif 12px normal; color:#333333"><option value="Select Date" selected="selected">Select Date</option></select>';

function showOptions(str)
{
	which_select = str;
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
		alert ("Browser does not support HTTP Request");
		return;
	}
		
	var url = getUrlFor(str);	
	//alert(url);//debugging  purpose. 
	if(url!=""){
		xmlhttp.onreadystatechange=stateChanged;
		xmlhttp.open("GET",url,true);
		xmlhttp.send(null);
	}
}

function stateChanged()
{
	if (xmlhttp.readyState==4)
	{
		var td_id = "";
		var form = document.getElementById("KHB");
		//debugging  purpose. 
		//alert(innerHTML=xmlhttp.responseText);
		//alert(which_select)
		switch(which_select){
			case 'state_name':
				td_id = "select_state_name";
				document.getElementById(td_id).innerHTML=xmlhttp.responseText;
				document.getElementById('select_lok_sabha_name').innerHTML=init_lok_sabha_name;
				document.getElementById('select_assembly_name').innerHTML=init_assembly_name;
				document.getElementById('select_panchayat_name').innerHTML=init_panchayat_name;
				break;
			case 'lok_sabha_name':
				td_id = "select_lok_sabha_name";
				document.getElementById(td_id).innerHTML=xmlhttp.responseText;
				document.getElementById('select_assembly_name').innerHTML=init_assembly_name;
				document.getElementById('select_panchayat_name').innerHTML=init_panchayat_name;
				break;
			case 'assembly_name':
				td_id = "select_assembly_name";
				document.getElementById(td_id).innerHTML=xmlhttp.responseText;
				document.getElementById('select_panchayat_name').innerHTML=init_panchayat_name;
				break;

			case 'panchayat_name':
				td_id = "select_panchayat_name";				
				document.getElementById(td_id).innerHTML=xmlhttp.responseText;
				break;
			case 'Submit':				
				 document.getElementById('thumbnail').innerHTML=xmlhttp.responseText;				 
				break;
			default :				
		}	
	}
}

function GetXmlHttpObject()
{
	if (window.XMLHttpRequest)
	{
	  // code for IE7+, Firefox, Chrome, Opera, Safari
	  return new XMLHttpRequest();
	}
	if (window.ActiveXObject)
	{
		// code for IE6, IE5
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	return null;
}

function resetForm(){
	location.reload(true);
}

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}
String.prototype.ltrim = function() {
	return this.replace(/^\s+/,"");
}
String.prototype.rtrim = function() {
	return this.replace(/\s+$/,"");
}
window.onload = function(){
	showOptions('state_name');
}