[RESOLVED] Validation when leaving textbox?

[KevinWilliams]

How could I make a validation check when the user leaves a textbox?

[usamaalam]

		private void Page_Load(object sender, System.EventArgs e)
		{
			string jsFunction = "";
			jsFunction += "<script>";
			jsFunction += "		function Validate() ";
			jsFunction += "		{";
			jsFunction += "			alert('Lost Focus');";
			jsFunction += "		}";
			jsFunction += "</script>";
			Response.Write(jsFunction);
			
			TextBox1.Attributes.Add("onBlur","javascript:Validate();");
		}

[KevinWilliams]

thanks so much!