var mPosX=0;
var mPosY=0;
var x=0,y=0;
var min=8;
var max=26;
calboxwidth=410;
calboxheight=350;
function increaseFontSize() {
   var p = document.getElementsByTagName('span');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 14;
      }
      if(s!=max) {
         s += 2;
      }
      p[i].style.fontSize = s+"px"
	  var k = 0;
   }
   var a = document.getElementsByTagName('a');
   for(i=0;i<a.length;i++) {
      if(a[i].style.fontSize) {
         var s = parseInt(a[i].style.fontSize.replace("px",""));
      } else {
         var s = 14;
      }
      if(s!=max) {
         s += 2;
      }
      a[i].style.fontSize = s+"px"
	  var k = 0;
   }
}
function decreaseFontSize() {
   var p = document.getElementsByTagName('span');
   for(i=0;i<p.length;i++) {
      if(p[i].style.fontSize) {
         var s = parseInt(p[i].style.fontSize.replace("px",""));
      } else {
         var s = 14;
      }
      if(s!=min) {
         s -= 2;
      }
      p[i].style.fontSize = s+"px"
	  var k = 0;
   }  
   var a = document.getElementsByTagName('a');
   for(i=0;i<a.length;i++) {
      if(a[i].style.fontSize) {
         var s = parseInt(a[i].style.fontSize.replace("px",""));
      } else {
         var s = 14;
      }
      if(s!=max) {
         s -= 2;
      }
      a[i].style.fontSize = s+"px"
	  var k = 0;
   }   
}
function normalFontSize() {
   var p = document.getElementsByTagName('span');
   for(i=0;i<p.length;i++) {
   	  var s = 12;
      p[i].style.fontSize = s+"px"
   }   
   var a = document.getElementsByTagName('a');
   for(i=0;i<a.length;i++) {
   	  var s = 12;
      a[i].style.fontSize = s+"px"
   }   

}
function PositionCalBox() {
	getAnchorPosition('callocation');
	document.getElementById('caldetails').style.left=x - calboxwidth;
	document.getElementById('caldetails').style.top=y + 20;
}
function PositionLogo() {
	getAnchorPosition('mainpage');
	document.getElementById('logobox').style.left=x - 47;
	document.getElementById('logobox').style.top = 20;
	document.getElementById('signupbox').style.left=x + (900 - 100);
	document.getElementById('signupbox').style.top=y + 50;
	document.getElementById('logobox').style.visibility='visible';
	document.getElementById('signupbox').style.visibility='visible';
}
//Utility functions
function getAnchorPosition(anchorname) {
	// This function will return an Object with x and y properties
	var useWindow=false;
	var coordinates=new Object();
	// Browser capability sniffing
	var use_gebi=false, use_css=false, use_layers=false;
	if (document.getElementById) { use_gebi=true; }
	else if (document.all) { use_css=true; }
	else if (document.layers) { use_layers=true; }
	// Logic to find position
 	if (use_gebi && document.all) {
		x=AnchorPosition_getPageOffsetLeft(document.all[anchorname]);
		y=AnchorPosition_getPageOffsetTop(document.all[anchorname]);
		}
	else if (use_gebi) {
		var o=document.getElementById(anchorname);
		x=AnchorPosition_getPageOffsetLeft(o);
		y=AnchorPosition_getPageOffsetTop(o);
		}
 	else if (use_css) {
		x=AnchorPosition_getPageOffsetLeft(document.all[anchorname]);
		y=AnchorPosition_getPageOffsetTop(document.all[anchorname]);
		}
	else if (use_layers) {
		var found=0;
		for (var i=0; i<document.anchors.length; i++) {
			if (document.anchors[i].name==anchorname) { found=1; break; }
			}
		if (found==0) {
			coordinates.x=0; coordinates.y=0; return coordinates;
			}
		x=document.anchors[i].x;
		y=document.anchors[i].y;
		}
	else {
		coordinates.x=0; coordinates.y=0; return coordinates;
		}
	coordinates.x=x;
	coordinates.y=y;
	mPosX=x;
	mPosY=y;

	}
// Functions for IE to get position of an object
function AnchorPosition_getPageOffsetLeft (el) {
	var ol=el.offsetLeft;
	while ((el=el.offsetParent) != null) { ol += el.offsetLeft; }
	return ol;
	}
function AnchorPosition_getWindowOffsetLeft (el) {
	return AnchorPosition_getPageOffsetLeft(el)-document.body.scrollLeft;
	}	
function AnchorPosition_getPageOffsetTop (el) {
	var ot=el.offsetTop;
	while((el=el.offsetParent) != null) { ot += el.offsetTop; }
	return ot;
	}
function AnchorPosition_getWindowOffsetTop (el) {
	return AnchorPosition_getPageOffsetTop(el)-document.body.scrollTop;
	}

function showCalEntry(cmd)
{
	mn=new Array();
	mn[0]="January";
	mn[1]="February";
	mn[2]="March";
	mn[3]="April";
	mn[4]="May";
	mn[5]="June";
	mn[6]="July";
	mn[7]="August";
	mn[8]="September";
	mn[9]="October";
	mn[10]="November";
	mn[11]="December";
	var dt = cmd.replace("?dt=","");
	var pts = dt.split("-");
	var ndt = mn[pts[1] - 1] + " " + pts[2] + ", " + pts[0];
	var ih = document.getElementById('caldate');
	ih.innerHTML = '&nbsp;<font face=Verdana size=3><b>Calendar entries for ' + ndt + '</b></font>';
	var c = document.getElementById('CalDetailFrame');
	c.src='scripts/ecal/ecal.php' + cmd;
	PositionCalBox();
	changeopacity('mainpage',20);
	document.getElementById('caldetails').style.visibility='visible';
}

function ClearCalBox() {
	document.getElementById('caldetails').style.visibility='hidden';
	//To prevent prior data being shown on next open, clear the source for the iframe
	var c = document.getElementById('CalDetailFrame');
	c.src='';
	changeopacity('mainpage',100);
}