function isEmail(look) {
if (look.value.indexOf("@") != "-1" &&
look.value.indexOf(".") != "-1" &&
look.value != " ")
return true;
else return false;
}
function clearField(thefield){
if (thefield.defaultValue==thefield.value)
thefield.value = ""
} 
<!-- 
function isInserted(look) {
value = look.value.replace(/^\s*|\s*$/g,"");
if (value == "" || value == null)
return false;
else return true;
}
function isEmailCh(look) {
if (look.value == "email @ddress" ||
look.value == null)
return false;
else return true;
}
function isNameCh(look) {
if (look.value == "your name" ||
look.value == null)
return false;
else return true;
}

function formReady(form) {
 if (isInserted(form.name) == false) {
 alert ("Please enter your Full Name.");
 form.name.focus();
 return false;
 }
 if (isNameCh(form.name) == false) {
 alert ("Please enter your Full Name.");
 form.name.focus();
 return false;
 }
 if (isInserted(form.from) == false) {
 alert ("Please enter your Email Address.");
 form.from.focus();
 return false;
 }
 if (isEmailCh(form.from) == false) {
 alert ("Please enter your Email Address.");
 form.from.focus();
 return false;
 }
document.form1.Submit.disabled = true;
return true;
}
/* basket.php */
function IntChk(form) {
if (isInserted(form.q) == false) {
alert ("You must enter a number to update this quantity.");
form.q.focus();
return false;
}
if(isNaN(parseInt(form.q.value))){
alert ("You must enter a number to update this quantity.");
form.q.focus();
return false;
}
}
function Disable() {
document.gotocheckout.Checkout.disabled = true;
}
function openWindow(url,w,h){
	var imageopen = url;
	var winwidth = screen.width;
	var winheight = screen.height;
	var leftpos = (winwidth - w)/2;
	var toppos = (winheight - h)/2;
	en = window.open(imageopen,"en","width="+w+",height="+h+", left="+leftpos+",top="+toppos+",scrollbars=no,toolbar=no,location=no");
	en.focus();
}

function placeAd() {
	if (document.body) {
		var xOffS = 2;
		//var yOffSet = ;
		var clientW = document.body.clientWidth;
		if (clientW > 1000) {
			if (clientW > 1010) xOffS = 8;
			xOffS = xOffS + [clientW - 760] / 2;
			document.all.rightad.style.left = [760 + xOffS];
			document.all.rightad.style.top = 0;
			document.all.rightad.style.display = "";
		}
	}
}

<!--
function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_nbGroup(event, grpName) { //v6.0
  var i,img,nbArr,args=MM_nbGroup.arguments;
  if (event == "init" && args.length > 2) {
    if ((img = MM_findObj(args[2])) != null && !img.MM_init) {
      img.MM_init = true; img.MM_up = args[3]; img.MM_dn = img.src;
      if ((nbArr = document[grpName]) == null) nbArr = document[grpName] = new Array();
      nbArr[nbArr.length] = img;
      for (i=4; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
        if (!img.MM_up) img.MM_up = img.src;
        img.src = img.MM_dn = args[i+1];
        nbArr[nbArr.length] = img;
    } }
  } else if (event == "over") {
    document.MM_nbOver = nbArr = new Array();
    for (i=1; i < args.length-1; i+=3) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = (img.MM_dn && args[i+2]) ? args[i+2] : ((args[i+1])? args[i+1] : img.MM_up);
      nbArr[nbArr.length] = img;
    }
  } else if (event == "out" ) {
    for (i=0; i < document.MM_nbOver.length; i++) {
      img = document.MM_nbOver[i]; img.src = (img.MM_dn) ? img.MM_dn : img.MM_up; }
  } else if (event == "down") {
    nbArr = document[grpName];
    if (nbArr)
      for (i=0; i < nbArr.length; i++) { img=nbArr[i]; img.src = img.MM_up; img.MM_dn = 0; }
    document[grpName] = nbArr = new Array();
    for (i=2; i < args.length-1; i+=2) if ((img = MM_findObj(args[i])) != null) {
      if (!img.MM_up) img.MM_up = img.src;
      img.src = img.MM_dn = (args[i+1])? args[i+1] : img.MM_up;
      nbArr[nbArr.length] = img;
  } }
}
//-->