// JavaScript Document
//Bhole Baba Ki Jai
/*trgt1-> value of option, trgt2->id of select box, trgt3->id of checked item on which you want to add option, trgt4->true or false (want to delete unselect or unwanted options)*/

function addSelectOpt(trgt1,trgt2,trgt3,trgt4)
{

	if(document.getElementById(trgt3).checked===true)
	{
		var i;
		var chkExist = 0;
		var optArr = document.getElementById(trgt2).options;
		
		for(i=0;i<optArr.length;i++)
		{
			if(optArr[i].value==trgt1)
			{
			chkExist = 1;
			}
		}
		if(chkExist==0)
		{
			var optn = document.createElement("OPTION");
			optn.text = trgt1;
			optn.value = trgt1;
			document.getElementById(trgt2).options.add(optn);
		}
		
		var newOptArr = document.getElementById(trgt2).options;
		for(i=0;i<newOptArr.length;i++)
		{
			if(newOptArr[i].value==trgt1)
			{
			newOptArr[i].selected=true;
			}
		}
	}
	else
	{
		var newOptArr = document.getElementById(trgt2).options;
		for(i=0;i<newOptArr.length;i++)
		{
			if(newOptArr[i].value==trgt1)
			{
				newOptArr[i].selected=false;
				if(trgt4===true)
				{
					document.getElementById(trgt2).remove(i);
				}
			}
		}
	}
}