function check_field()
		{
		    if (emptyField(document.getElementById("ctl00_ContentPlaceHolder1_txtEmailId")))
			{
				alert('Please Enter Email id of Recipient');
				document.getElementById("ctl00_ContentPlaceHolder1_txtEmailId").focus();
				return false;
			}
			if (!validEmailId(document.getElementById("ctl00_ContentPlaceHolder1_txtEmailId").value))
				
			{
				alert('Please Enter Valid Email id of Recipient.');
				document.getElementById("ctl00_ContentPlaceHolder1_txtEmailId").focus();
				return false;
			}

			if (emptyField(document.getElementById("ctl00_ContentPlaceHolder1_txtyouremail")))
			{
				alert('Please Enter Your Email id');
				document.getElementById("ctl00_ContentPlaceHolder1_txtyouremail").focus();
				return false;
			}
			if (!validEmailId(document.getElementById("ctl00_ContentPlaceHolder1_txtyouremail").value))
				
			{
				alert('Please Enter Valid Your Email id.');
				document.getElementById("ctl00_ContentPlaceHolder1_txtyouremail").focus();
				return false;
			}
			if (emptyField(document.getElementById("ctl00_ContentPlaceHolder1_txtmessage")))
			{
				alert('Please Enter Your Message');
				document.getElementById("ctl00_ContentPlaceHolder1_txtmessage").focus();
				return false;
			}
		}