function isValidURL2(url){
   var RegExp = /^(((https?):)?\/\/)?(([\d\w]|%[a-fA-f\d]{2,2})+(:([\d\w]|%[a-fA-f\d]{2,2})+)?@)?([\d\w][-\d\w]{0,253}[\d\w]\.)+[\w]{2,4}(\.)?(:[\d]+)?(\/([-+_~.\d\w]|%[a-fA-f\d]{2,2})*)*(\?(&?([-+,_~.\d\w]|%[a-fA-f\d]{2,2})=?)*)?(#([-+,_~.\d\w]|%[a-fA-f\d]{2,2})*)?$/;
    if(RegExp.test(url)){
        return true;
    }else{
        return false;
    }
}

function step1() {
	if(isValidURL2(document.getElementById("URL").value)){
		document.getElementById("step1").className = "step1";
		document.getElementById("step2").className = "step2highlight";
		document.getElementById("step3").className = "step3";
		document.getElementById("snappysubmit").className = "buttonhighlight";
		document.getElementById("snappycopy").className = "button";
		document.getElementById("snappyemail").className = "button";
		document.getElementById("snappygo").className = "button";
	}
}

function step2() {
	document.getElementById("step1").className = "step1";
	document.getElementById("step2").className = "step2";
	document.getElementById("step3").className = "step3highlight";
	document.getElementById("snappysubmit").className = "button";
	document.getElementById("snappycopy").className = "buttonhighlight";
	document.getElementById("snappyemail").className = "buttonhighlight";
	document.getElementById("snappygo").className = "buttonhighlight";
}

function step3() {
	document.getElementById("step1").className = "step1highlight";
	document.getElementById("step2").className = "step2";
	document.getElementById("step3").className = "step3";
	document.getElementById("snappysubmit").className = "button";
	document.getElementById("snappycopy").className = "button";
	document.getElementById("snappyemail").className = "button";
	document.getElementById("snappygo").className = "button";
}