input光标位置

兼容谷歌火狐-input光标位置

input框在没有添加任何效果的情况下，输入文字后光标始终在最后的位置，谷歌||火狐效果一样

但是在给input加入点击事件后 　　谷歌：input框插入文字后，光标会自动到最后位置

　　　　　　　　　　　　　　　　火狐：input框插入文字后，光标在插入文字的后面

兼容：光标在文字的最后面

　　function moveEnd(obj){
 　　obj.focus();
 　　var len = obj.value.length;
 　　if (document.selection) {
     　　var sel = obj.createTextRange();
     　　sel.moveStart('character',len);
     　　sel.collapse();
     　　sel.select();
 　　} else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') {
     　　obj.selectionStart = obj.selectionEnd = len;
 　　　　}
 　　}
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　兼容：光标在中间插入文字的后面　　　　　　

　　　function moveEnd(obj){
　　　　obj.focus();
　　　　var len = obj.value.length;
　　　　if (document.selection) {
　　　　var sel = obj.createTextRange();
　　　　sel.moveStart('character',len);
　　　　sel.collapse();
　　　　sel.select();
　　　　} else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') {
　　　　　　setCursorPosition(obj,obj.selectionStart)

　　　　　　}

　　　　}aaarticlea/png;base64,iVBORw0KGgoAAAANSUhEUgAAAQoAAABcCAIAAAAZCWzAAAAJkElEQVR4nO2dv2vjTBrH579Q6TKlS5UqVaoUqHFhg0t1K+e9IqXYwggSeF3ce6i512LBiZvjFWlWZIvThRSCyy0mzU6xhV7SKISA2OJ2rhhJ1q+x5fxwdi/fD2LZjDwzGns+1jyTXT3kvht3d3c3NzfX19c3Nzd3d3cda+3EE7uI43g0GhmGcX5+3jx7dHRk5Gxt6sOHD6yNh4eH0Wg0mUyKEt5g8eNkMhmNRg8PD63VGWMstAmxw+7lG4mcft+JupakkS1Luke7tZ0sB2SwTBhjsacRzYsrZ9vKnpd1/xmhLWkeDUyiunRDvUe9kULIHiZud57S0Xw+Nwzj+Pi4eer4+NgosbUpkR6LxcIwjNvb26Kkpsft7a1hGIvForV67GmkQPPi8kdZ/VTTlWeqPUKIdKA7IZ8jaWj1eqa/njBpYElVFzaWJMuBcGY12mbUVfPZuVWPJHQGco8QSTH9ov22IWTVQt9UJCLZkaBqrf9iIJoXs8QfN0ZBl6Z6IBHSU02f1t9TP5rxHg4G7ipNi5/0WZQ2xsJr5FfeU83teuzNjSd29+7dO8MwPn/+XCuvufEUPSaTyXQ6bT1VMJ1ODw8PhacrGgj0iBxZ0j2aMsZS6ukSnw71Kdyc7ptLQovUbixrGnpETl+yAj5/tuhBXZVovI8kcpfRhiGw2NNIv687Ee+ptWqjf8YYSwOTKC5ljCX+uDKOxB9L8nhJU8ZYsnJNRa68p5JiBwljLAltmfRlZcAvirpa0UpND0m2fD4wT5e268En61Zubm66T+WXaLPj1O+CSI/mnaF292D5Haa1ev4BbNYj8ceV783QyiZGldjTqouPLSU7LYdCu3QX2qJHaBMy9tPyWeEQYk8jxCymfUvVlv4Z1zx/E5LloOQHdZVKV9TTKu/p+hx1FdI6qNpYSq2FFvRo4VX1iGyJ1GkupqmrknF5NbStJPHHrZq1UFujJf54kx5p5CgS6Wm2F+avEQ6hZlpL1Zb+60bEnkbyW0u81IlWCaeEC9Zq32I9Su91aP//L64K4jh+//79fD7f2lT3xVVTj+l0Wo7d62zXI7QJsbbFlvXFR4eSyOnXbi4CGmu00OaBQonY04i+LOZ0Qv3ZWO0RSXVXm4bQciOqVW3rn7pqw7bM+2aDobVfPZ4yZXflhUJzDg9CNryg4IVC88YHIFxcCYOEomItBO9SQl2VyHbYspap0L5Gq8Y061CgTOqP+SCEQxCu8IqqLf1TV61H46EtZa+JbKm0WuNfAvvW4/4n2dgdDoeijd3z83M+lb98+bK1qQ0bu8PhsBx5Nzd2h8Nh543d9oVAGpiSpGa7PWkc2PYyZuXwecctqzV0OehJirVcZXthSeSZ5jKuhObNNVp2RbqbBdRp7FuyVLwmcu0gThnj8W62jdA+hLoebVUb/UdOv7njti6MHJnkwXQSOlpPeg097l/YkGdpvHDg5OSkWGVdXV2dnJzw8lZzmoj0YIxdXFwYhnF4eFi+hzDGbm9vDw8PDcO4uroS1W18AMJ1MvVt/UAihPTkQWNjd9ctqwrJamkP5B4hhEgHqulxU9Z6NNdoWb1sB5YQ6UAZOEHpDkCX2T7o+loFQ2jcPZpVG/232lEpTkJHP5Dy8fh7jj3KlCfxzpN3I88l3qdPn/g9pMZwOOzoxv1GPRhjFxcXvIvpdHp6enp6ejqdTnkXW9x4FnbdstqJ5hptv7x2/3V20+M+N+Ql9Hium1Icx/P5nEfqw+Hw6OhoPp/Hcdy9hc16MMYeHh4Wi8VkMuHuTSaTxWKxaU31fOy8ZbUDrSuyPfLa/TfZWY+3wFY9wBsBerQAPQAHerQAPQAHerQAPQAHerRwdnb27du31/5owOsDPVq4vLz8+PEjDAHQo53Ly8uzs7MP4G0DPQAQAj0AEAI9ABACPQAQQv74xx84cOBoPchrb50B8OMCPQAQAj0AEAI9ABACPQAQAj0AEAI9ABAi1OP66/f5vxiOt3xcf/2+z7n4A9Kux/XX76Nf//zlt2scb/kY/frnGzekXY/fw++Hf/33ni8F/Gj88tv13//539e+itcEegAh0OOn0YMQ7CLsG+gBPYAQ6NFZD+pp7dlT0pXHc1eRnjwoMlLlWap4RivGGH+AaYXsqfhJYKv8GanrhFbrp6/m1Ut6pIEpra+l0mxenJS691bbHkoO2oEe3fSg/lgm7Y+ej5x+3woSxniCKv7k7sQfS5rLE1oFVl+erWq1qKtmz/imrtrPkkck/pgXpoGVV2fpajawo3StRxrZ5WuJPU2rp5OMPU3JHmmcBFY9GSXoCvTYrkcS2EpPsaxBh9xb1NOamYwCq5wphbHqw7JDuzLViR1mZTR/deT0zSDN9aCuNh6XriWypXqmlcjpS8+XnPQNAz066BGFq6Q6jYVQV6nlEUqpp/dqdlSyC8dLXa7fPap9RU5fcSnXI17quheXzsdLvZ6HJfa0SkYU8FigR+fYo4sekSPL5YVMaMtyj8jZ2isjraemTnzzgEcOipUlTOGLK8YYY9Qb9CRih4QQlgam4kSVa4lsSdEHlTAlsqW+42dJH9ahD9gZ6PF8eqShLct21PjWTgKrXyqvJXJMI1vOTUhXMzUTJ41mxez2ZwrXI3JUK0wr15L4Y1IYmSzHshOx0CZSb+BmiV1WM1VG7PE4oMdz6UE9vafXQ+SMyOkXS640MCvtNNZRzTg6tIjmxYQQLc9ZIboW6ml9J+J/rgtdBbH544Aez6FHEtrqwUDgBsuDh+zvtfQ/2/WIPU2yQ9bMTdrcBKCuorg0DcxyZF7uHewE9HiyHok/7kn1+wZ1VcnMvuqT0FaK2Dxe6tWwOY1s1fSLPVy+EEoDS1Jnq5QxlkSurrm0+mvB9bWsZnK/CG2oy381k0a2kl9RacEGdgV6PE6PuNjApa5S+07nrypSNfbUsRtVkmvXv/Spb+a/FixyNOaxx7qsXY914kX+S8l8D2CdjlEvpYMEuwE98I9KgBDoAT2AEOgBPYAQ6PHT6AH2D/SAHkAI9Nj0f83/8rf/4HjLB/6v+aYnlfwe4njTxxt3g+E5VwBsAHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACAEegAgBHoAIAR6ACDkf500ODaLj72XAAAAAElFTkSuQmCC" alt="" />

　 设置光标位置：

　　setSelectionRange(obj.selectionStart,obj.selectionStart);

　　selectionStart
    　　输入性元素selection起点的位置，可读写。
　　selectionEnd
    　　输入性元素selection结束点的位置，可读写。
　　setSelectionRange(start, end)
    　　设置输入性元素selectionStart和selectionEnd值