LayoutTests/svg/custom/js-update-gradient.svg

<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 20010904//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
<svg width="450" height="450" xmlns="http://www.w3.org/2000/svg">
<defs>
    <linearGradient id="Gradient" gradientUnits="userSpaceOnUse" x1="10" y1="10" x2="440" y2="10">
        <stop id="stop1" stop-color="blue" offset="0"/>
        <stop stop-color="red" offset="1"/>
    </linearGradient>
</defs>

<script>
if (window.layoutTestController)
    layoutTestController.waitUntilDone();

window.setTimeout("clickNow()", 0);

function clickNow() {
    if (window.eventSender) {
        eventSender.mouseMoveTo(150, 50);
        eventSender.mouseDown();
        eventSender.mouseUp();
    }

    if (window.layoutTestController) {
        layoutTestController.notifyDone();
    }
}


function mouseHandler(evt)
{
    var gradient = document.getElementById("Gradient");
    var stop = document.getElementById("stop1");

    if(gradient.x1.baseVal.value == 150) {
        gradient.setAttribute("x1", "10");
        stop.setAttribute("stop-color", "blue");
        stop.setAttribute("stop-opacity", "1.0");
        stop.setAttribute("offset", "0");
    } else {
        gradient.x1.baseVal.value = 150;
        stop.setAttribute("stop-color", "green");
        stop.setAttribute("stop-opacity", "0.5");
        stop.setAttribute("offset", "0.3");
    }
}
</script>

<rect onclick="mouseHandler(evt)" x="10" y="10" width="430" height="80" fill="url(#Gradient)" />
<rect x="10" y="100" width="430" height="80" fill="url(#Gradient)" />

</svg>