function accessCSS(layerID) {
            if (document.getElementById) {
                return document.getElementById(layerID).style;
            } else if (document.all) {
                return document.all[layerID].style;
            } else if (document.layers) {
                return document.layers[layerID];
            }
        }

        function changeBackground(comp, color) {
            accessCSS(comp).background=color;
        }

        function resetBackground(comp) {
                accessCSS(comp).background="#ffffff";
        }

	function autotab(){
	if (document.getElementById("sin1").value.length==9){
		document.getElementById("sin2").focus();
		}
	}
	function authenticate(){
	
		if(document.login.sin1.value==""){
			//alert("Please put in your correct SIN");
			window.location = "login_failure.jsp";
		}
	
		else if(document.login.sin2.value==""){
			//alert("Please put in your correct SIN");
			window.location = "login_failure.jsp";
		}
		else if (isNaN(document.login.sin1.value)||isNaN(document.login.sin2.value)) {
			window.location = "login_failure.jsp";
		}
	
		else if(document.login.sin1.value=="" || document.login.sin2.value==""){
			alert("Please enter your SIN");
		}
	
		else{
		        document.login.sin.value = document.login.sin1.value+""+document.login.sin2.value;
		 	document.login.submit();
		  }
	}