JavaScript notes

Here are some handy JavaScript widgets:

Cookies

<pre> <script language="JavaScript"><!-- function setCookie ( name, value ) { var exp = new Date () ; // 30 Day expiry time. exp.setTime ( exp.getTime() + 1000 * 60 * 60 * 24 * 30 ) ; document.cookie = name + "=" + escape ( value ) + "; path=/ ; expires=" + exp.toGMTString () ; } function delCookie ( name ) { document.cookie = name + "=; path=/ ; expires=Thu, 01-Jan-70 00:00:01 GMT/"; } function getCookie ( name ) { // This gets ALL of the cookies from this site - so we have to slice it out. var dc = document.cookie ; var cname = name + "=" ; if (dc.length > 0) { begin = dc.indexOf(cname); if (begin != -1) { begin += cname.length; end = dc.indexOf(";", begin); if (end == -1) end = dc.length; return unescape(dc.substring(begin, end)); } } return "" ; // Missing cookie } // --> </script> <form> <input type="button" value="Set Cookie" onClick="setCookie('myCookie','The value of my cookie!')" > <input type="button" value="Delete Cookie" onClick="delCookie('myCookie')" > <input type="button" value="Get Cookie" onClick="this.form.tf.value = getCookie('myCookie')" > <input type="text" name="tf" size="30" > </form> </pre> <nowiki>