function setSelectionRange(input, selectionStart, selectionEnd) {
if (input.setSelectionRange) {
	input.focus();
	input.setSelectionRange(selectionStart, selectionEnd);
}
else if (input.createTextRange) {
	var range = input.createTextRange();
	range.collapse(true);
	range.moveEnd('character', selectionEnd);
	range.moveStart('character', selectionStart);
	range.select();
}
}

function replaceSelection (input, replaceString) {
	if (input.setSelectionRange) {
		var selectionStart = input.selectionStart;
		var selectionEnd = input.selectionEnd;

		input.value = input.value.substring(0, selectionStart)+ replaceString + input.value.substring(selectionEnd);
	
		if (selectionStart != selectionEnd){ 
			setSelectionRange(input, selectionStart, selectionStart + 	replaceString.length);
		}else{
			setSelectionRange(input, selectionStart + replaceString.length, selectionStart + replaceString.length);
		}

	}else if (document.selection) {
		var range = document.selection.createRange();

		if (range.parentElement() == input) {
			var isCollapsed = range.text == '';
			range.text = replaceString;

			if (!isCollapsed)  {
				range.moveStart('character', -replaceString.length);
				range.select();
			}
		}
	}
}

// We are going to catch the TAB key so that we can use it, Hooray!
function catchTab(item,e){
	if(navigator.userAgent.match("Gecko")){
		c=e.which;
	}else{
		c=e.keyCode;
	}
	if(c==9){
		replaceSelection(item,String.fromCharCode(9));
		return false;
	}
			
}