function setCSS(cssvalue)
{
	if (cssvalue=='norm'){
		document.getElementById('css1').href = 'bstyle.css';
        document.getElementById('cssSwitch').innerHTML="<a href='#' title='Printer Friendly Version - Access Key : t' id='cssSwitch' accesskey='t' onclick='setCSS(\"print\")'>print version</a>";
        document.getElementById('css2').href = 'bpstyle.css';
        }
    if (cssvalue=='print'){
		document.getElementById('css1').href = 'pstyle.css';
        document.getElementById('cssSwitch').innerHTML="<a href='#' title='Graphical Version - Access Key : t' id='cssSwitch' accesskey='t' onclick='setCSS(\"norm\")'>normal version</a>";
        document.getElementById('css2').href = 'pstyle.css';
        }
        
}

function changePortTitle(newtext)
{
		document.getElementById('port_title').innerHTML = '&nbsp;:&nbsp;'+newtext;
}

function clearPortTitle()
{
		document.getElementById('port_title').innerHTML = '&nbsp;';
}

function clearText(thefield){
	if (thefield.defaultValue==thefield.value)
	thefield.value = ""
	}

function goBack(){
    history.go(-1);
}

function checkHeight()
	{
		var winW = 630, winH = 460;
		
		if (parseInt(navigator.appVersion)>3) {
		 if (navigator.appName=="Netscape") {
		  winW = window.innerWidth;
		  winH = window.innerHeight;
		  if(document.getElementById('contentholder').offsetHeight<(winH-28)){
			document.getElementById('contentholder').style.height=(winH-28)+'px';
			}
		 }
		 if (navigator.appName.indexOf("Microsoft")!=-1) {
		  winW = document.body.offsetWidth;
		  winH = document.documentElement.clientHeight;
		 	winH=winH;
            
		  if(document.getElementById('contentholder').offsetHeight<(winH-28)){
			document.getElementById('contentholder').style.height=(winH-28)+'px';
			}
		 }
	
		}
		
		
	}