/**
* Function to add javascript code in the footer
* to add a function that controls the lazy load
*/
function setJavascriptLazyLoad()
{
// If you've already entered the Javascript code in the footer section
// leave the partition function otherwise the variable and constant
if (self::$JavascriptLazyLoad) {
return;
} else {
self::$JavascriptLazyLoad = true;
}
// Javascript code to render the component google+
// this method is used for asynchronous loading
$javascript = '<script type="text/javascript">';
$javascript .= 'function szgooglecheckviewport(el) {';
$javascript .= 'var top=el.offsetTop;';
$javascript .= 'var left=el.offsetLeft;';
$javascript .= 'var width=el.offsetWidth;';
$javascript .= 'var height=el.offsetHeight;';
$javascript .= 'while(el.offsetParent) {';
$javascript .= 'el=el.offsetParent;';
$javascript .= 'top+=el.offsetTop;';
$javascript .= 'left+=el.offsetLeft;';
$javascript .= '}';
$javascript .= 'return (';
$javascript .= 'top<(window.pageYOffset+window.innerHeight) && ';
$javascript .= 'left<(window.pageXOffset+window.innerWidth) && ';
$javascript .= '(top+height)>window.pageYOffset && ';
$javascript .= '(left+width)>window.pageXOffset';
$javascript .= ');';
$javascript .= '}';
$javascript .= "</script>" . "\n";
// Running echo on the footer of the javascript code generated
// This code is added to a single block together with other functions
echo $javascript;
}
