function GetStartLeftPos(bwidth, topPos) {

	var Bwidth = BrowserWidth()

	var leftPos = (Bwidth - bwidth) / 2;

	if(leftPos < 10)
		leftPos = 10

	str = "<style> #startBox { position: absolute; left: " + leftPos + "px; top: " + topPos + "px; } </style>";

	document.write(str);

}


function BrowserWidth() {

 	var myWidth = 0;

	if( typeof( window.innerWidth ) == 'number' ) {
    	//Non-IE
    	myWidth = window.innerWidth;
  	} else if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) {
    	//IE 6+ in 'standards compliant mode'
    	myWidth = document.documentElement.clientWidth;
  	} else if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) {
    	//IE 4 compatible
    	myWidth = document.body.clientWidth;
  	}

  	return myWidth;
}