Actually there is such a button:
<input type="button" value="-" onclick="changeSign(this.value)" name="r_abs_sph_sign" id="r_abs_sph_sign_min"/> When you click, its value attribute with a minus should change to a plus. That's actually the question - how to use jQuery in the changeSign () function to select this button and change its value?
PS: There will be about eight such buttons on the page, so I would like to do all this with one function and not to write my own for each button.
8 of the same type and all id ?
Think about architecture more, this is a bad approach, it is better to use classes.
$(function(){ $('.r_abs_sph_sign_min').click(function(){ // ΠΠ΅ΡΠ΅Π±ΠΈΡΠ°Π΅ΠΌ Π²ΡΠ΅ ΠΊΠ½ΠΎΠΏΠΊΠΈ Ρ ΠΊΠ»Π°ΡΡΠΎΠΌ r_abs_sph_sign_min ΠΈ ΡΠ»ΡΡΠ°Π΅ΠΌ ΡΠΎΠ±ΡΡΠΈΠ΅ ΠΊΠ»ΠΈΠΊΠ° // this ΡΠΊΠ°Π·ΡΠ²Π°Π΅Ρ Π½Π° ΠΊΠ½ΠΎΠΏΠΊΡ this.value = this.value === '-' ? '+' : '-'; // ΠΠ΅Π½ΡΠ΅ΠΌ Π·Π½Π°ΠΊ Π² Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΠΈ ΠΎΡ ΡΠΎΠ³ΠΎ, ΠΊΠ°ΠΊΠΎΠΉ ΡΠ΅ΠΉΡΠ°Ρ }); }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <input type="button" value="-" name="r_abs_sph_sign" class="r_abs_sph_sign_min"/> | <input type="button" value="-" name="r_abs_sph_sign" class="r_abs_sph_sign_min"/> | <input type="button" value="-" name="r_abs_sph_sign" class="r_abs_sph_sign_min"/> | <input type="button" value="-" name="r_abs_sph_sign" class="r_abs_sph_sign_min"/> | <input type="button" value="-" name="r_abs_sph_sign" class="r_abs_sph_sign_min"/> | <input type="button" value="-" name="r_abs_sph_sign" class="r_abs_sph_sign_min"/> Source: https://ru.stackoverflow.com/questions/554441/
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