function chooseStyle(styletitle){ // function to switch style sheets 
if (document.getElementById){setStylesheet(styletitle)}
}

// Main stylesheet switcher 
function setStylesheet(title)
{
var i, cacheobj, altsheets=[""]

//cycle through link objects looking for alternate stylesheets and title

for(i=0; (cacheobj=document.getElementsByTagName("link")[i]); i++) 
{

// if alternate stylesheet and title 
if(cacheobj.getAttribute("rel").toLowerCase()=="alternate stylesheet" && cacheobj.getAttribute("title"))
{
//disable normal style sheet
cacheobj.disabled = true

// store alt stylesheets in array
altsheets.push(cacheobj)

// enable alternate stylesheet with title that matches parameter
if(cacheobj.getAttribute("title") == title) 

//enable chosen style sheet
cacheobj.disabled = false 

}   // end get title
}   // end for
}   // end function