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js用正则表达式控制价格输入实现代码

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<title>用正则表达式控制价格输入</title> 
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<img src="/_New/_cj/myeditor/sysimage/space.gif" class="ewebeditor__script" _ewebeditor_fake_tag="script" _ewebeditor_fake_value="%3Cscript%20type%3D%22text%2Fjavascript%22%3E%20%0D%0Avar%20record%3D%7B%20%0D%0Anum%3A%22%22%20%0D%0A%7D%20%0D%0Avar%20checkDecimal%3Dfunction(n)%7B%20%0D%0Avar%20decimalReg%3D%2F%5E%5Cd%7B0%2C8%7D%5C.%7B0%2C1%7D(%5Cd%7B1%2C2%7D)%3F%24%2F%3B%2F%2Fvar%20decimalReg%3D%2F%5E%5B-%5C%2B%5D%3F%5Cd%7B0%2C8%7D%5C.%7B0%2C1%7D(%5Cd%7B1%2C2%7D)%3F%24%2F%3B%20%0D%0Aif(n.value!%3D%22%22%26%26decimalReg.test(n.value))%7B%20%0D%0Arecord.num%3Dn.value%3B%20%0D%0A%7Delse%7B%20%0D%0Aif(n.value!%3D%22%22)%7B%20%0D%0An.value%3Drecord.num%3B%20%0D%0A%7D%20%0D%0A%7D%20%0D%0A%7D%20%0D%0A%3C%2Fscript%3E"> 
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<h3>实用技巧：用正则表达式控制价格输入</h3> 
销售价<input maxlength="10" size="18" type="text" name="price" value="" onkeyup='checkDecimal(this)'/> 
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