var colorChanger = new Array();
colorChanger[0] = "blue";
colorChanger[1] = "yellow";
colorChanger[2] = "green";
colorChanger[3] = "white";
colorChanger[4] = "#FF00FF";
colorChanger[5] = "#990099";
var hits = 0;
var cellnumshort = /^\d{7}$/;
var cellnumlong = /^\d{10}$/;

function changeColor()
{
	var color = document.getElementById("content");
	color.bgColor=colorChanger[hits];
	hits+=1;
	if(hits>=6)
	{
		hits=0;
	}
}

function cancel()
{
	var sender = document.getElementById("txtSender"); 
	var receiver = document.getElementById("txtReceiver"); 
	var message = document.getElementById("txtSMSMessage"); 
	
	sender.value = "";
	receiver.value = "";
	message.value = "";						
}

function ClearMessage()
{
	var message = document.getElementById("txtSMSMessage");
	message.value = "";
}

function eraseNumber()
{
	document.getElementById("txtReceiver").value = "";
}

function eraseFrom()
{
	document.getElementById("txtSender").value = "";
}		


function validate_form()
{
	var valid = true;
	var receiver = document.getElementById("txtReceiver");
	var sender = document.getElementById("txtSender");
	var message = document.getElementById("txtSMSMessage")
	if (receiver.value == "" || sender.value == "" || message.value == "")
	{
		alert(receiver.value);
		alert(sender.value);
		alert(message.value);
		alert ("Incomplete form! Message cannot be sent");
		valid = false;
	}
	else
	{
		if (document.getElementById("txtReceiver").value.search(cellnumshort)==-1)
		{
			if (document.getElementById("txtReceiver").value.search(cellnumlong)==-1)
			{
				alert ("Mobile Number has an incorrect format");
				valid = false;
			}
		}
	}
	return valid;
}

function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}