Script used to redirect mobile browsers to Blogger Mobile Template view

Blogger_Mobile_Redirect.js

<script type='text/javascript'>
//<![CDATA[ Wrap in CDATA to prevent issues with < and & characters in Blogger xml template
//Function to replace or add a parameter to current URL. From: http://stackoverflow.com/questions/486896/
function insertParam(key, value) {
    key = escape(key); value = escape(value);
    var kvp = document.location.search.substr(1).split('&');

    var i = kvp.length; var x; while (i--) {
        x = kvp[i].split('=');

        if (x[0] == key) {
            x[1] = value;
            kvp[i] = x.join('=');
            break;
        }
    }

    if (i < 0) { kvp[kvp.length] = [key, value].join('='); }

    //this will reload the page, it's likely better to store this until finished
    document.location.search = kvp.join('&');
}
var agent = navigator.userAgent;
var isIEMobile = !!agent.match(/IEMobile/i),
    isOperaMobile = !!agent.match(/Opera Mobi/i),
    isSafariMobile = !!agent.match(/Mobile Safari/i),
    isOtherMobile = !!agent.match(/Mobile/i);

//These should already work:
//isIphone = !!agent.match(/iPhone/i),
//isBlackberry = !!agent.match(/blackberry/i),

//Check if mobile template parameter already exists in URL
var isMobileTemplate = !!location.toString().match(/[?&]m=[01]/i);

if (!isMobileTemplate) { //Don't run if parameter already exists
    if (isIEMobile | isOperaMobile | isSafariMobile | isOtherMobile) {
        //alert("Redirect to mobile template view");
        insertParam("m", 1);
    } else {
        //alert("Don't redirect useragent:" + agent);
    }
}
//]]>
</script>