启用\禁用基于文本框的按钮 [英] Enable\disable button based on textbox

问题描述

要基于在文本框中输入的文本来启用/禁用按钮，并且仅当在文本框中输入文本而不是空格时才启用按钮

To enable\disable button based on the text entered in the textbox and the button gets enabled only on entering the text in the textbox but not the spaces

推荐答案

function EnableDisableButton()
    {
       var txt = document.getElementById("<%=txtEmbedCode.ClientID %>");
       var btn = document.getElementById("<%=btnPreview.ClientID %>");
       if(txt.value.replace(/^\s+|\s+

/g，" )== " ) { btn.disabled = true ; } 其他 { btn.disabled = false ; } }

/g, "")=="") { btn.disabled = true; } else { btn.disabled = false; } }

并调用此函数EnableDisableButton()

and call this function EnableDisableButton()

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