var ClassInvalid = "invalid-textbox";
var ClassValid = "valid-textbox";

function checkrequire(input,min)
{
	if(input != null)
	{
		var input_name = input.id;
		var input_desc = input_name + "_desc";
		
		if(min == null || min == 0)
		{
			if(input.value.Trim().length == 0)
			{
				document.getElementById(input_name).className = ClassInvalid;
				document.getElementById(input_desc).innerHTML = txt_alert[input_name];
				return false;
			}
			else
			{
				document.getElementById(input_name).className = ClassValid;
				document.getElementById(input_desc).innerHTML = "";	
				return true;
			}
		}
		else
		{	
			if (input.value.length < min)
			{
				document.getElementById(input_name).className = ClassInvalid;
				document.getElementById(input_desc).innerHTML = txt_alert[input_name];
				return false;
			} 
			else 
			{
				document.getElementById(input_name).className = ClassValid;
				document.getElementById(input_desc).innerHTML = "";
				return true;
			}
		}
	}
}